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<h1>source/ConstraintGenerator.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#include "ConstraintGenerator.h"</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="preprocessor">#include <map></span>
<a name="l00004"></a>00004 <span class="preprocessor">#include <vector></span>
<a name="l00005"></a>00005 <span class="preprocessor">#include <sstream></span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="preprocessor">#include "Helpers.h"</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include "Integer.h"</span>
<a name="l00009"></a>00009 <span class="preprocessor">#include "LinearProblem.h"</span>
<a name="l00010"></a>00010 <span class="preprocessor">#include "Pointer.h"</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include "PointerAnalyzer.h"</span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="preprocessor">#include "llvm/Constants.h"</span>
<a name="l00014"></a>00014 <span class="preprocessor">#include "llvm/LLVMContext.h"</span>
<a name="l00015"></a>00015 <span class="preprocessor">#include "llvm/User.h"</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="keyword">using</span> std::pair;
<a name="l00018"></a>00018 <span class="keyword">using</span> std::stringstream;
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="keyword">using namespace </span>llvm;
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="keyword">namespace </span>boa {
<a name="l00023"></a>00023
<a name="l00024"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a29c4fcb5f1f1b5bd2dcee516b4827b6c">00024</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a29c4fcb5f1f1b5bd2dcee516b4827b6c">ConstraintGenerator::AddBuffer</a>(<span class="keyword">const</span> <a class="code" href="classboa_1_1Buffer.html">Buffer</a>& buf, <span class="keyword">const</span> <span class="keywordtype">string</span> &location, <span class="keywordtype">bool</span> literal) {
<a name="l00025"></a>00025 <span class="keywordflow">if</span> (!(IgnoreLiterals_ && literal)) {
<a name="l00026"></a>00026 <span class="comment">// add buffer to problem unless it is a string literal and we ignore literals</span>
<a name="l00027"></a>00027 cp_.AddBuffer(buf);
<a name="l00028"></a>00028 buffers_.insert(buf);
<a name="l00029"></a>00029 }
<a name="l00030"></a>00030
<a name="l00031"></a>00031 GenerateConstraint(buf.NameExpression(VarLiteral::MAX, VarLiteral::LEN_READ),
<a name="l00032"></a>00032 buf.NameExpression(VarLiteral::MAX, VarLiteral::USED),
<a name="l00033"></a>00033 VarLiteral::MAX, <span class="stringliteral">"Buffer Addition"</span>, location, Constraint::STRUCTURAL);
<a name="l00034"></a>00034 GenerateConstraint(buf.NameExpression(VarLiteral::MAX, VarLiteral::USED),
<a name="l00035"></a>00035 buf.NameExpression(VarLiteral::MAX, VarLiteral::LEN_WRITE),
<a name="l00036"></a>00036 VarLiteral::MAX, <span class="stringliteral">"Buffer Addition"</span>, location, Constraint::STRUCTURAL);
<a name="l00037"></a>00037
<a name="l00038"></a>00038 GenerateConstraint(buf.NameExpression(VarLiteral::MIN, VarLiteral::LEN_READ),
<a name="l00039"></a>00039 buf.NameExpression(VarLiteral::MIN, VarLiteral::USED),
<a name="l00040"></a>00040 VarLiteral::MIN, <span class="stringliteral">"Buffer Addition"</span>, location, Constraint::STRUCTURAL);
<a name="l00041"></a>00041 GenerateConstraint(buf.NameExpression(VarLiteral::MIN, VarLiteral::USED),
<a name="l00042"></a>00042 buf.NameExpression(VarLiteral::MIN, VarLiteral::LEN_WRITE),
<a name="l00043"></a>00043 VarLiteral::MIN, <span class="stringliteral">"Buffer Addition"</span>, location, Constraint::STRUCTURAL);
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045
<a name="l00046"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a61280ca09cac26d858e08b75626b5381">00046</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a61280ca09cac26d858e08b75626b5381">ConstraintGenerator::VisitInstruction</a>(<span class="keyword">const</span> Instruction *I, <span class="keyword">const</span> Function *F) {
<a name="l00047"></a>00047 <span class="keywordflow">if</span> (<span class="keyword">const</span> DbgDeclareInst *D = dyn_cast<const DbgDeclareInst>(I)) {
<a name="l00048"></a>00048 <a class="code" href="classboa_1_1ConstraintGenerator.html#a9823a9de41fef76525bfb4afb2b23e72">SaveDbgDeclare</a>(D);
<a name="l00049"></a>00049 <span class="keywordflow">return</span>;
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keywordflow">if</span> (isa<DbgValueInst>(I)) {
<a name="l00053"></a>00053 <span class="keywordflow">return</span>;
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keywordflow">switch</span> (I->getOpcode()) {
<a name="l00057"></a>00057 <span class="comment">// Terminators</span>
<a name="l00058"></a>00058 <span class="keywordflow">case</span> Instruction::Ret:
<a name="l00059"></a>00059 GenerateReturnConstraint(dyn_cast<const ReturnInst>(I), F);
<a name="l00060"></a>00060 <span class="keywordflow">break</span>;
<a name="l00061"></a>00061 <span class="keywordflow">case</span> Instruction::Br:
<a name="l00062"></a>00062 <span class="keywordflow">case</span> Instruction::Switch:
<a name="l00063"></a>00063 <span class="keywordflow">case</span> Instruction::IndirectBr:
<a name="l00064"></a>00064 <span class="keywordflow">case</span> Instruction::Invoke:
<a name="l00065"></a>00065 <span class="keywordflow">case</span> Instruction::Unwind:
<a name="l00066"></a>00066 <span class="keywordflow">case</span> Instruction::Unreachable:
<a name="l00067"></a>00067 <span class="keywordflow">break</span>;
<a name="l00068"></a>00068 <span class="comment">// Standard binary operators...</span>
<a name="l00069"></a>00069 <span class="keywordflow">case</span> Instruction::Add:
<a name="l00070"></a>00070 <span class="keywordflow">case</span> Instruction::FAdd:
<a name="l00071"></a>00071 GenerateAddConstraint(dyn_cast<const BinaryOperator>(I));
<a name="l00072"></a>00072 <span class="keywordflow">break</span>;
<a name="l00073"></a>00073 <span class="keywordflow">case</span> Instruction::Sub:
<a name="l00074"></a>00074 <span class="keywordflow">case</span> Instruction::FSub:
<a name="l00075"></a>00075 GenerateSubConstraint(dyn_cast<const BinaryOperator>(I));
<a name="l00076"></a>00076 <span class="keywordflow">break</span>;
<a name="l00077"></a>00077 <span class="keywordflow">case</span> Instruction::Mul:
<a name="l00078"></a>00078 <span class="keywordflow">case</span> Instruction::FMul:
<a name="l00079"></a>00079 GenerateMulConstraint(dyn_cast<const BinaryOperator>(I));
<a name="l00080"></a>00080 <span class="keywordflow">break</span>;
<a name="l00081"></a>00081 <span class="comment">// case Instruction::UDiv:</span>
<a name="l00082"></a>00082 <span class="keywordflow">case</span> Instruction::SDiv:
<a name="l00083"></a>00083 <span class="keywordflow">case</span> Instruction::FDiv:
<a name="l00084"></a>00084 GenerateDivConstraint(dyn_cast<const BinaryOperator>(I));
<a name="l00085"></a>00085 <span class="keywordflow">break</span>;
<a name="l00086"></a>00086 <span class="comment">// case Instruction::URem:</span>
<a name="l00087"></a>00087 <span class="comment">// case Instruction::SRem:</span>
<a name="l00088"></a>00088 <span class="comment">// case Instruction::FRem:</span>
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">// Logical operators...</span>
<a name="l00091"></a>00091 <span class="keywordflow">case</span> Instruction::And:
<a name="l00092"></a>00092 GenerateAndConstraint(dyn_cast<const BinaryOperator>(I));
<a name="l00093"></a>00093 <span class="keywordflow">break</span>;
<a name="l00094"></a>00094 <span class="keywordflow">case</span> Instruction::Or:
<a name="l00095"></a>00095 <span class="keywordflow">case</span> Instruction::Xor:
<a name="l00096"></a>00096 GenerateOrXorConstraint(I);
<a name="l00097"></a>00097 <span class="keywordflow">break</span>;
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="comment">// Memory instructions...</span>
<a name="l00100"></a>00100 <span class="keywordflow">case</span> Instruction::Alloca:
<a name="l00101"></a>00101 GenerateAllocaConstraint(dyn_cast<const AllocaInst>(I));
<a name="l00102"></a>00102 <span class="keywordflow">break</span>;
<a name="l00103"></a>00103 <span class="keywordflow">case</span> Instruction::Load:
<a name="l00104"></a>00104 GenerateLoadConstraint(dyn_cast<const LoadInst>(I));
<a name="l00105"></a>00105 <span class="keywordflow">break</span>;
<a name="l00106"></a>00106 <span class="keywordflow">case</span> Instruction::Store:
<a name="l00107"></a>00107 GenerateStoreConstraint(dyn_cast<const StoreInst>(I));
<a name="l00108"></a>00108 <span class="keywordflow">break</span>;
<a name="l00109"></a>00109 <span class="keywordflow">case</span> Instruction::GetElementPtr:
<a name="l00110"></a>00110 <a class="code" href="classboa_1_1ConstraintGenerator.html#a13d9ac99924220e4e7e0b9cf4e8e5205">GenerateGetElementPtrConstraint</a>(dyn_cast<const GetElementPtrInst>(I));
<a name="l00111"></a>00111 <span class="keywordflow">break</span>;
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="comment">// Convert instructions...</span>
<a name="l00114"></a>00114 <span class="keywordflow">case</span> Instruction::Trunc:
<a name="l00115"></a>00115 <span class="keywordflow">case</span> Instruction::ZExt:
<a name="l00116"></a>00116 <span class="keywordflow">case</span> Instruction::SExt:
<a name="l00117"></a>00117 GenerateCastConstraint(dyn_cast<const CastInst>(I), <span class="stringliteral">"Int sign extend"</span>);
<a name="l00118"></a>00118 <span class="comment">// case Instruction::FPToUI:</span>
<a name="l00119"></a>00119 <span class="keywordflow">case</span> Instruction::FPExt:
<a name="l00120"></a>00120 GenerateCastConstraint(dyn_cast<const CastInst>(I), <span class="stringliteral">"Float sign extend"</span>);
<a name="l00121"></a>00121 <span class="keywordflow">break</span>;
<a name="l00122"></a>00122 <span class="keywordflow">case</span> Instruction::FPToSI:
<a name="l00123"></a>00123 GenerateCastConstraint(dyn_cast<const CastInst>(I), <span class="stringliteral">"Float to int cast"</span>);
<a name="l00124"></a>00124 <span class="keywordflow">break</span>;
<a name="l00125"></a>00125 <span class="keywordflow">case</span> Instruction::UIToFP:
<a name="l00126"></a>00126 GenerateCastConstraint(dyn_cast<const CastInst>(I), <span class="stringliteral">"Uint to float cast"</span>);
<a name="l00127"></a>00127 <span class="keywordflow">break</span>;
<a name="l00128"></a>00128 <span class="keywordflow">case</span> Instruction::SIToFP:
<a name="l00129"></a>00129 GenerateCastConstraint(dyn_cast<const CastInst>(I), <span class="stringliteral">"Int to float cast"</span>);
<a name="l00130"></a>00130 <span class="keywordflow">break</span>;
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="comment">// Exploiting case fall-through.</span>
<a name="l00133"></a>00133 <span class="keywordflow">case</span> Instruction::IntToPtr:
<a name="l00134"></a>00134 <span class="keywordflow">case</span> Instruction::PtrToInt:
<a name="l00135"></a>00135 <span class="keywordflow">case</span> Instruction::BitCast:
<a name="l00136"></a>00136 GenerateCastConstraint(dyn_cast<const CastInst>(I), <span class="stringliteral">"Arbitrary cast"</span>);
<a name="l00137"></a>00137 <span class="keywordflow">break</span>;
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="comment">// Other instructions...</span>
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">// Fallthrough.</span>
<a name="l00142"></a>00142 <span class="keywordflow">case</span> Instruction::ICmp:
<a name="l00143"></a>00143 <span class="keywordflow">case</span> Instruction::FCmp:
<a name="l00144"></a>00144 <a class="code" href="classboa_1_1ConstraintGenerator.html#add49592f3ab3e0a564debb47ed3ab19c">GenerateBooleanConstraint</a>(I);
<a name="l00145"></a>00145 <span class="keywordflow">break</span>;
<a name="l00146"></a>00146 <span class="keywordflow">case</span> Instruction::PHI:
<a name="l00147"></a>00147 GeneratePhiConstraint(dyn_cast<const PHINode>(I));
<a name="l00148"></a>00148 <span class="keywordflow">break</span>;
<a name="l00149"></a>00149 <span class="keywordflow">case</span> Instruction::Select:
<a name="l00150"></a>00150 GenerateSelectConstraint(dyn_cast<const SelectInst>(I));
<a name="l00151"></a>00151 <span class="keywordflow">break</span>;
<a name="l00152"></a>00152 <span class="keywordflow">case</span> Instruction::Call:
<a name="l00153"></a>00153 GenerateCallConstraint(dyn_cast<const CallInst>(I));
<a name="l00154"></a>00154 <span class="keywordflow">break</span>;
<a name="l00155"></a>00155 <span class="keywordflow">case</span> Instruction::Shl:
<a name="l00156"></a>00156 <span class="keywordflow">case</span> Instruction::AShr:
<a name="l00157"></a>00157 <span class="keywordflow">case</span> Instruction::LShr:
<a name="l00158"></a>00158 GenerateShiftConstraint(dyn_cast<const BinaryOperator>(I));
<a name="l00159"></a>00159 <span class="keywordflow">break</span>;
<a name="l00160"></a>00160 <span class="comment">// case Instruction::VAArg:</span>
<a name="l00161"></a>00161 <span class="comment">// case Instruction::ExtractElement:</span>
<a name="l00162"></a>00162 <span class="comment">// case Instruction::InsertElement:</span>
<a name="l00163"></a>00163 <span class="comment">// case Instruction::ShuffleVector:</span>
<a name="l00164"></a>00164 <span class="comment">// case Instruction::ExtractValue:</span>
<a name="l00165"></a>00165 <span class="comment">// case Instruction::InsertValue:</span>
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordflow">default</span> :
<a name="l00168"></a>00168 LOG << <span class="stringliteral">"unhandled instruction - "</span> << endl;
<a name="l00169"></a>00169 I->dump();
<a name="l00170"></a>00170 <span class="keywordflow">break</span>; <span class="comment">//TODO</span>
<a name="l00171"></a>00171 }
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173
<a name="l00174"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#ab046d91978647b04cfc8f274e71e61a2">00174</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#ab046d91978647b04cfc8f274e71e61a2">ConstraintGenerator::VisitGlobal</a>(<span class="keyword">const</span> GlobalValue *G) {
<a name="l00175"></a>00175 <span class="comment">// Verify that the type of the global is a pointer type (should always be true)</span>
<a name="l00176"></a>00176 <span class="keyword">const</span> Type *t = G->getType();
<a name="l00177"></a>00177 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *p = dyn_cast<const PointerType>(t)) {
<a name="l00178"></a>00178 t = p->getElementType();
<a name="l00179"></a>00179 } <span class="keywordflow">else</span> {
<a name="l00180"></a>00180 LOG << <span class="stringliteral">"can't handle global variable"</span> << endl;
<a name="l00181"></a>00181 <span class="keywordflow">return</span>;
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 <span class="keywordflow">if</span> (<span class="keyword">const</span> GlobalVariable *GV = dyn_cast<const GlobalVariable>(G)) {
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (<span class="keyword">const</span> ArrayType *ar = dyn_cast<const ArrayType>(t)) {
<a name="l00185"></a>00185 <span class="keywordtype">unsigned</span> len = ar->getNumElements() - 1;
<a name="l00186"></a>00186 <span class="keywordtype">string</span> s;
<a name="l00187"></a>00187 <span class="keywordflow">if</span> (<span class="keyword">const</span> ConstantArray *CA = dyn_cast<const ConstantArray>(GV->getInitializer())) {
<a name="l00188"></a>00188 <span class="keywordflow">if</span> (CA->isCString()) {
<a name="l00189"></a>00189 <span class="comment">// string literals are global arrays </span>
<a name="l00190"></a>00190 s = CA->getAsString().c_str();
<a name="l00191"></a>00191 <a class="code" href="namespaceboa_1_1Helpers.html#ab0366b31813d989238cd2962efab9d40">Helpers::ReplaceInString</a>(s, <span class="charliteral">'\n'</span>, <span class="stringliteral">"\\n"</span>);
<a name="l00192"></a>00192 <a class="code" href="namespaceboa_1_1Helpers.html#ab0366b31813d989238cd2962efab9d40">Helpers::ReplaceInString</a>(s, <span class="charliteral">'\t'</span>, <span class="stringliteral">"\\t"</span>);
<a name="l00193"></a>00193 <a class="code" href="namespaceboa_1_1Helpers.html#ab0366b31813d989238cd2962efab9d40">Helpers::ReplaceInString</a>(s, <span class="charliteral">'\r'</span>, <span class="stringliteral">""</span>);
<a name="l00194"></a>00194 <a class="code" href="namespaceboa_1_1Helpers.html#ab0366b31813d989238cd2962efab9d40">Helpers::ReplaceInString</a>(s, <span class="charliteral">'['</span>, <span class="stringliteral">"\\["</span>);
<a name="l00195"></a>00195 <a class="code" href="namespaceboa_1_1Helpers.html#ab0366b31813d989238cd2962efab9d40">Helpers::ReplaceInString</a>(s, <span class="charliteral">']'</span>, <span class="stringliteral">"\\]"</span>);
<a name="l00196"></a>00196 s = <span class="stringliteral">"string literal \""</span> + s + <span class="stringliteral">"\""</span>;
<a name="l00197"></a>00197 <a class="code" href="classboa_1_1Buffer.html">Buffer</a> buf(G, s, <span class="stringliteral">""</span>); <span class="comment">// TODO - file? line?</span>
<a name="l00198"></a>00198 LOG << <span class="stringliteral">"Adding string literal. Len - "</span> << len << <span class="stringliteral">" at "</span> << (<span class="keywordtype">void</span>*)G << endl;
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <a class="code" href="classboa_1_1ConstraintGenerator.html#a0ed165979ddc3a18e8a6c012feeddcdf">GenerateAllocConstraint</a>(G, ar, <span class="stringliteral">"(literal)"</span>);
<a name="l00201"></a>00201 GenerateConstraint(buf, len, VarLiteral::LEN_WRITE, VarLiteral::MAX, s, <span class="stringliteral">"(literal)"</span>);
<a name="l00202"></a>00202 GenerateConstraint(buf, len, VarLiteral::LEN_WRITE, VarLiteral::MIN, s, <span class="stringliteral">"(literal)"</span>);
<a name="l00203"></a>00203 <a class="code" href="classboa_1_1ConstraintGenerator.html#a29c4fcb5f1f1b5bd2dcee516b4827b6c">AddBuffer</a>(buf, <span class="stringliteral">"(literal)"</span>, <span class="keyword">true</span>);
<a name="l00204"></a>00204 <span class="keywordflow">return</span>;
<a name="l00205"></a>00205 }
<a name="l00206"></a>00206 }
<a name="l00207"></a>00207 <span class="comment">// Otherwise this is a global array</span>
<a name="l00208"></a>00208 s = GV->getNameStr();
<a name="l00209"></a>00209 <a class="code" href="classboa_1_1Buffer.html">Buffer</a> buf1(G, s, <span class="stringliteral">""</span>);
<a name="l00210"></a>00210 <a class="code" href="classboa_1_1ConstraintGenerator.html#a0ed165979ddc3a18e8a6c012feeddcdf">GenerateAllocConstraint</a>(G, ar, <span class="stringliteral">"Global Array"</span>);
<a name="l00211"></a>00211 <a class="code" href="classboa_1_1ConstraintGenerator.html#a29c4fcb5f1f1b5bd2dcee516b4827b6c">AddBuffer</a>(buf1, <span class="stringliteral">"Global Array"</span>);
<a name="l00212"></a>00212 <span class="keywordflow">return</span>;
<a name="l00213"></a>00213 }
<a name="l00214"></a>00214 <span class="keywordflow">if</span> (t->isIntegerTy()) {
<a name="l00215"></a>00215 <a class="code" href="classboa_1_1Integer.html">Integer</a> globalInt(GV);
<a name="l00216"></a>00216 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(globalInt, GV->getInitializer(), VarLiteral::USED,
<a name="l00217"></a>00217 <span class="stringliteral">"global int"</span>, <span class="stringliteral">""</span>); <span class="comment">//TODO: location</span>
<a name="l00218"></a>00218 <a class="code" href="classboa_1_1ConstraintGenerator.html#a7c9dfbbfe540a0288cba6c95dbb323ad">GeneratePointerDerefConstraint</a>(GV, <span class="stringliteral">""</span>);
<a name="l00219"></a>00219 }
<a name="l00220"></a>00220 }
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="keywordtype">void</span> ConstraintGenerator::GenerateReturnConstraint(<span class="keyword">const</span> ReturnInst* I, <span class="keyword">const</span> Function *F) {
<a name="l00224"></a>00224 <span class="keywordflow">if</span> (I->getReturnValue()) { <span class="comment">// non void</span>
<a name="l00225"></a>00225 <span class="keywordflow">if</span> (F->getReturnType()->isPointerTy()) {
<a name="l00226"></a>00226 <a class="code" href="classboa_1_1Pointer.html">Pointer</a> from(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getReturnValue())), to(F);
<a name="l00227"></a>00227 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(from, to, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00228"></a>00228 } <span class="keywordflow">else</span> {
<a name="l00229"></a>00229 Integer intLiteral(F);
<a name="l00230"></a>00230 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(intLiteral, I->getReturnValue(), VarLiteral::USED, <span class="stringliteral">"return value"</span>,
<a name="l00231"></a>00231 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234 }
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="keywordtype">void</span> ConstraintGenerator::GenerateAndConstraint(<span class="keyword">const</span> BinaryOperator* I) {
<a name="l00237"></a>00237 Integer res(I);
<a name="l00238"></a>00238 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(res, I->getOperand(0), VarLiteral::USED, <span class="stringliteral">"bitwise and"</span>,
<a name="l00239"></a>00239 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00240"></a>00240 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(res, I->getOperand(1), VarLiteral::USED, <span class="stringliteral">"bitwise and"</span>,
<a name="l00241"></a>00241 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00242"></a>00242 }
<a name="l00243"></a>00243
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <span class="keywordtype">void</span> ConstraintGenerator::GenerateAddConstraint(<span class="keyword">const</span> BinaryOperator* I) {
<a name="l00246"></a>00246 <span class="keywordtype">string</span> blame = <span class="stringliteral">"Addition"</span>;
<a name="l00247"></a>00247 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> maxResult, minResult;
<a name="l00248"></a>00248 maxResult.add(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MAX));
<a name="l00249"></a>00249 minResult.add(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MIN));
<a name="l00250"></a>00250 maxResult.add(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MAX));
<a name="l00251"></a>00251 minResult.add(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MIN));
<a name="l00252"></a>00252
<a name="l00253"></a>00253 Integer intLiteral(I);
<a name="l00254"></a>00254 GenerateConstraint(intLiteral, maxResult, VarLiteral::USED, VarLiteral::MAX, blame,
<a name="l00255"></a>00255 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00256"></a>00256 GenerateConstraint(intLiteral, minResult, VarLiteral::USED, VarLiteral::MIN, blame,
<a name="l00257"></a>00257 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00258"></a>00258 }
<a name="l00259"></a>00259
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="keywordtype">void</span> ConstraintGenerator::GenerateSubConstraint(<span class="keyword">const</span> BinaryOperator* I) {
<a name="l00262"></a>00262 <span class="keywordtype">string</span> blame = <span class="stringliteral">"Subtraction"</span>;
<a name="l00263"></a>00263 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> maxResult, minResult;
<a name="l00264"></a>00264 maxResult.add(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MAX));
<a name="l00265"></a>00265 minResult.add(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MIN));
<a name="l00266"></a>00266 maxResult.sub(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MIN));
<a name="l00267"></a>00267 minResult.sub(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MAX));
<a name="l00268"></a>00268
<a name="l00269"></a>00269 Integer intLiteral(I);
<a name="l00270"></a>00270 GenerateConstraint(intLiteral, maxResult, VarLiteral::USED, VarLiteral::MAX, blame,
<a name="l00271"></a>00271 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00272"></a>00272 GenerateConstraint(intLiteral, minResult, VarLiteral::USED, VarLiteral::MIN, blame,
<a name="l00273"></a>00273 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00274"></a>00274 }
<a name="l00275"></a>00275
<a name="l00276"></a>00276 <span class="keywordtype">void</span> ConstraintGenerator::GenerateMulConstraint(<span class="keyword">const</span> BinaryOperator* I) {
<a name="l00277"></a>00277 <span class="keywordtype">string</span> blame = <span class="stringliteral">"Multiplication"</span>;
<a name="l00278"></a>00278 Integer intLiteral(I);
<a name="l00279"></a>00279 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> operand0Max = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MAX);
<a name="l00280"></a>00280 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> operand1Max = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MAX);
<a name="l00281"></a>00281 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> operand0Min = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MIN);
<a name="l00282"></a>00282 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> operand1Min = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MIN);
<a name="l00283"></a>00283
<a name="l00284"></a>00284 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> *minOperand, *maxOperand;
<a name="l00285"></a>00285 <span class="keywordtype">double</span> constOperand;
<a name="l00286"></a>00286
<a name="l00287"></a>00287 <span class="keywordflow">if</span> (operand0Max.<a class="code" href="classboa_1_1Constraint_1_1Expression.html#a32fe4a7ca50adbae36ba131e95af3382">IsConst</a>()) {
<a name="l00288"></a>00288 constOperand = operand0Max.GetConst();
<a name="l00289"></a>00289 minOperand = &operand1Min;
<a name="l00290"></a>00290 maxOperand = &operand1Max;
<a name="l00291"></a>00291 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (operand1Max.IsConst()) {
<a name="l00292"></a>00292 constOperand = operand1Max.GetConst();
<a name="l00293"></a>00293 minOperand = &operand0Min;
<a name="l00294"></a>00294 maxOperand = &operand0Max;
<a name="l00295"></a>00295 } <span class="keywordflow">else</span> {
<a name="l00296"></a>00296 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(intLiteral, <span class="stringliteral">"Unconst multiplication."</span>, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00297"></a>00297 <span class="keywordflow">return</span>;
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299
<a name="l00300"></a>00300 minOperand->mul(constOperand);
<a name="l00301"></a>00301 maxOperand->mul(constOperand);
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="keywordtype">string</span> loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00304"></a>00304
<a name="l00305"></a>00305 GenerateConstraint(intLiteral, *maxOperand, VarLiteral::USED, VarLiteral::MAX, blame, loc);
<a name="l00306"></a>00306 GenerateConstraint(intLiteral, *minOperand, VarLiteral::USED, VarLiteral::MAX, blame, loc);
<a name="l00307"></a>00307 GenerateConstraint(intLiteral, *maxOperand, VarLiteral::USED, VarLiteral::MIN, blame, loc);
<a name="l00308"></a>00308 GenerateConstraint(intLiteral, *minOperand, VarLiteral::USED, VarLiteral::MIN, blame, loc);
<a name="l00309"></a>00309 }
<a name="l00310"></a>00310
<a name="l00311"></a>00311 <span class="keywordtype">void</span> ConstraintGenerator::GenerateDivConstraint(<span class="keyword">const</span> BinaryOperator* I) {
<a name="l00312"></a>00312 <span class="keywordtype">string</span> blame = <span class="stringliteral">"Division"</span>;
<a name="l00313"></a>00313 Integer intLiteral(I);
<a name="l00314"></a>00314 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> operand1 = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MAX);
<a name="l00315"></a>00315 <span class="keywordflow">if</span> (!operand1.<a class="code" href="classboa_1_1Constraint_1_1Expression.html#a32fe4a7ca50adbae36ba131e95af3382">IsConst</a>()) {
<a name="l00316"></a>00316 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(intLiteral, <span class="stringliteral">"Non-const denominator."</span>, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00317"></a>00317 <span class="keywordflow">return</span>;
<a name="l00318"></a>00318 }
<a name="l00319"></a>00319 <span class="keywordtype">double</span> constOperand = operand1.GetConst();
<a name="l00320"></a>00320 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> minOperand = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MAX);
<a name="l00321"></a>00321 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> maxOperand = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MIN);
<a name="l00322"></a>00322
<a name="l00323"></a>00323 minOperand.div(constOperand);
<a name="l00324"></a>00324 maxOperand.div(constOperand);
<a name="l00325"></a>00325
<a name="l00326"></a>00326 <span class="keywordtype">string</span> loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00327"></a>00327
<a name="l00328"></a>00328 GenerateConstraint(intLiteral, maxOperand, VarLiteral::USED, VarLiteral::MAX, blame, loc);
<a name="l00329"></a>00329 GenerateConstraint(intLiteral, minOperand, VarLiteral::USED, VarLiteral::MAX, blame, loc);
<a name="l00330"></a>00330 GenerateConstraint(intLiteral, maxOperand, VarLiteral::USED, VarLiteral::MIN, blame, loc);
<a name="l00331"></a>00331 GenerateConstraint(intLiteral, minOperand, VarLiteral::USED, VarLiteral::MIN, blame, loc);
<a name="l00332"></a>00332 }
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="keywordtype">void</span> ConstraintGenerator::GenerateCastConstraint(<span class="keyword">const</span> CastInst* I, <span class="keyword">const</span> <span class="keywordtype">string</span>& blame) {
<a name="l00335"></a>00335 Integer intLiteral(I);
<a name="l00336"></a>00336 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(intLiteral, I->getOperand(0), VarLiteral::USED, blame,
<a name="l00337"></a>00337 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00338"></a>00338 }
<a name="l00339"></a>00339
<a name="l00340"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a7c9dfbbfe540a0288cba6c95dbb323ad">00340</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a7c9dfbbfe540a0288cba6c95dbb323ad">ConstraintGenerator::GeneratePointerDerefConstraint</a>(<a class="code" href="classboa_1_1Pointer.html">Pointer</a> buf, <span class="keyword">const</span> <span class="keywordtype">string</span> &location) {
<a name="l00341"></a>00341 <span class="keywordtype">string</span> blame(<span class="stringliteral">"Pointer Dereference ["</span> + location + <span class="stringliteral">"]"</span>);
<a name="l00342"></a>00342 <a class="code" href="classboa_1_1Constraint.html">Constraint</a> cMax(blame, location), cMin(blame, location);
<a name="l00343"></a>00343
<a name="l00344"></a>00344 cMax.addBig(buf.NameExpression(VarLiteral::MAX, VarLiteral::LEN_WRITE));
<a name="l00345"></a>00345 cp_.AddConstraint(cMax);
<a name="l00346"></a>00346 LOG << <span class="stringliteral">"Adding - "</span> << buf.NameExpression(VarLiteral::MAX, VarLiteral::LEN_WRITE) << <span class="stringliteral">" >= 0 \n"</span>;
<a name="l00347"></a>00347
<a name="l00348"></a>00348 cMin.addSmall(buf.NameExpression(VarLiteral::MIN, VarLiteral::LEN_WRITE));
<a name="l00349"></a>00349 cp_.AddConstraint(cMin);
<a name="l00350"></a>00350 LOG << <span class="stringliteral">"Adding - "</span> << buf.NameExpression(VarLiteral::MIN, VarLiteral::LEN_WRITE) << <span class="stringliteral">" <= 0 \n"</span>;
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352
<a name="l00353"></a>00353 <span class="keywordtype">void</span> ConstraintGenerator::GenerateStoreConstraint(<span class="keyword">const</span> StoreInst* I) {
<a name="l00354"></a>00354 <span class="keywordtype">string</span> loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00355"></a>00355 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *pType = dyn_cast<const PointerType>(I->getPointerOperand()->getType())) {
<a name="l00356"></a>00356 <span class="keywordflow">if</span> (!(pType->getElementType()->isPointerTy())) {
<a name="l00357"></a>00357 <span class="comment">// store into a pointer - store int value</span>
<a name="l00358"></a>00358 <a class="code" href="classboa_1_1Integer.html">Integer</a> intLiteral(I->getPointerOperand());
<a name="l00359"></a>00359 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(intLiteral, I->getValueOperand(), VarLiteral::USED,
<a name="l00360"></a>00360 <span class="stringliteral">"store instruction"</span>, loc);
<a name="l00361"></a>00361 <a class="code" href="classboa_1_1ConstraintGenerator.html#a7c9dfbbfe540a0288cba6c95dbb323ad">GeneratePointerDerefConstraint</a>(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getPointerOperand()), loc);
<a name="l00362"></a>00362 } <span class="keywordflow">else</span> {
<a name="l00363"></a>00363 Pointer pFrom(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getValueOperand())), pTo(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getPointerOperand()));
<a name="l00364"></a>00364 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(pFrom, pTo, loc);
<a name="l00365"></a>00365 <span class="comment">// GeneratePointerDerefConstraint(I->getPointerOperand());</span>
<a name="l00366"></a>00366 }
<a name="l00367"></a>00367 } <span class="keywordflow">else</span> {
<a name="l00368"></a>00368 LOG << <span class="stringliteral">"Error - Trying to store into a non pointer type"</span> << endl;
<a name="l00369"></a>00369 }
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371
<a name="l00372"></a>00372 <span class="keywordtype">void</span> ConstraintGenerator::AnalyzePointers() {
<a name="l00373"></a>00373 PointerAnalyzer analyzer;
<a name="l00374"></a>00374 analyzer.SetBuffers(buffers_);
<a name="l00375"></a>00375 <span class="keywordflow">for</span> (set<Pointer>::iterator pi = unknownPointers_.begin(); pi != unknownPointers_.end(); ++pi) {
<a name="l00376"></a>00376 set<Buffer> buffers = analyzer.PointsTo(*pi);
<a name="l00377"></a>00377 <span class="keywordflow">for</span> (set<Buffer>::iterator bi = buffers.begin(); bi != buffers.end(); ++bi) {
<a name="l00378"></a>00378 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(*pi, *bi, <span class="stringliteral">"(boa pointer analyzer)"</span>);
<a name="l00379"></a>00379 LOG << <span class="stringliteral">"Pointer Analyzer"</span> << endl;
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382 }
<a name="l00383"></a>00383
<a name="l00384"></a>00384 <span class="keywordtype">void</span> ConstraintGenerator::GenerateLoadConstraint(<span class="keyword">const</span> LoadInst* I) {
<a name="l00385"></a>00385 <span class="keywordtype">string</span> loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00386"></a>00386 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *pType = dyn_cast<const PointerType>(I->getPointerOperand()->getType())) {
<a name="l00387"></a>00387 <span class="keywordflow">if</span> (!(pType->getElementType()->isPointerTy())) {
<a name="l00388"></a>00388 <span class="comment">// load from a pointer - load int value</span>
<a name="l00389"></a>00389 Integer intLiteral(I);
<a name="l00390"></a>00390 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(intLiteral, I->getPointerOperand(),VarLiteral::USED,
<a name="l00391"></a>00391 <span class="stringliteral">"load instruction"</span>, loc);
<a name="l00392"></a>00392 <a class="code" href="classboa_1_1ConstraintGenerator.html#a7c9dfbbfe540a0288cba6c95dbb323ad">GeneratePointerDerefConstraint</a>(I->getPointerOperand(), loc);
<a name="l00393"></a>00393 } <span class="keywordflow">else</span> {
<a name="l00394"></a>00394 Pointer pFrom(I->getPointerOperand()), pTo(I);
<a name="l00395"></a>00395 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(pFrom, pTo, loc);
<a name="l00396"></a>00396
<a name="l00397"></a>00397 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *ppType = dyn_cast<const PointerType>(pType->getElementType())) {
<a name="l00398"></a>00398 <span class="keywordflow">if</span> (ppType->getElementType()->isPointerTy()) {
<a name="l00399"></a>00399 unknownPointers_.insert(pTo);
<a name="l00400"></a>00400 }
<a name="l00401"></a>00401 }
<a name="l00402"></a>00402 }
<a name="l00403"></a>00403 } <span class="keywordflow">else</span> {
<a name="l00404"></a>00404 LOG << <span class="stringliteral">"Error - Trying to load from a non pointer type"</span> << endl;
<a name="l00405"></a>00405 }
<a name="l00406"></a>00406 }
<a name="l00407"></a>00407
<a name="l00408"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">00408</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">ConstraintGenerator::GenerateBufferAliasConstraint</a>(<a class="code" href="classboa_1_1VarLiteral.html">VarLiteral</a> from, <a class="code" href="classboa_1_1VarLiteral.html">VarLiteral</a> to,
<a name="l00409"></a>00409 <span class="keyword">const</span> <span class="keywordtype">string</span>& location,
<a name="l00410"></a>00410 <span class="keyword">const</span> Value *offset,
<a name="l00411"></a>00411 <span class="keyword">const</span> <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> *offsetExp,
<a name="l00412"></a>00412 <span class="keyword">const</span> <span class="keywordtype">string</span>& blame) {
<a name="l00413"></a>00413 <span class="keywordflow">if</span> ((offset != NULL) && (offsetExp != NULL)) {
<a name="l00414"></a>00414 <span class="comment">// only one type of offset allowed</span>
<a name="l00415"></a>00415 LOG << <span class="stringliteral">"Error - GenerateBufferAliasConstraint got both offset and offsetExp"</span> << endl;
<a name="l00416"></a>00416 <span class="keywordflow">return</span>;
<a name="l00417"></a>00417 }
<a name="l00418"></a>00418
<a name="l00419"></a>00419 <a class="code" href="classboa_1_1Constraint.html#a98e88d0d16ba5ce2819763af085357c5">Constraint::Type</a> type = Constraint::ALIASING;
<a name="l00420"></a>00420 <span class="keywordtype">string</span> aliasBlame = <span class="stringliteral">"buffer alias"</span>;
<a name="l00421"></a>00421 <span class="keywordflow">if</span> (offset != NULL || offsetExp != NULL) {
<a name="l00422"></a>00422 aliasBlame += <span class="stringliteral">" with offset"</span>;
<a name="l00423"></a>00423 }
<a name="l00424"></a>00424 <span class="keywordflow">if</span> (blame != <span class="stringliteral">""</span>) {
<a name="l00425"></a>00425 aliasBlame += <span class="stringliteral">" - "</span> + blame;
<a name="l00426"></a>00426 }
<a name="l00427"></a>00427
<a name="l00428"></a>00428 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> ToReadMax = to.NameExpression(VarLiteral::MAX, VarLiteral::LEN_READ);
<a name="l00429"></a>00429 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> ToReadMin = to.NameExpression(VarLiteral::MIN, VarLiteral::LEN_READ);
<a name="l00430"></a>00430 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> ToWriteMax = to.NameExpression(VarLiteral::MAX, VarLiteral::LEN_WRITE);
<a name="l00431"></a>00431 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> ToWriteMin = to.NameExpression(VarLiteral::MIN, VarLiteral::LEN_WRITE);
<a name="l00432"></a>00432 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> FromReadMax = from.NameExpression(VarLiteral::MAX, VarLiteral::LEN_READ);
<a name="l00433"></a>00433 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> FromReadMin = from.NameExpression(VarLiteral::MIN, VarLiteral::LEN_READ);
<a name="l00434"></a>00434 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> FromWriteMax = from.NameExpression(VarLiteral::MAX, VarLiteral::LEN_WRITE);
<a name="l00435"></a>00435 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> FromWriteMin = from.NameExpression(VarLiteral::MIN, VarLiteral::LEN_WRITE);
<a name="l00436"></a>00436 <span class="keywordflow">if</span> (offset != NULL) {
<a name="l00437"></a>00437 FromReadMax.sub(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(offset, VarLiteral::MAX));
<a name="l00438"></a>00438 FromReadMin.sub(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(offset, VarLiteral::MIN));
<a name="l00439"></a>00439 FromWriteMax.sub(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(offset, VarLiteral::MAX));
<a name="l00440"></a>00440 FromWriteMin.sub(<a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(offset, VarLiteral::MIN));
<a name="l00441"></a>00441 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (offsetExp != NULL) {
<a name="l00442"></a>00442 FromReadMax.sub(*offsetExp);
<a name="l00443"></a>00443 FromReadMin.sub(*offsetExp);
<a name="l00444"></a>00444 FromWriteMax.sub(*offsetExp);
<a name="l00445"></a>00445 FromWriteMin.sub(*offsetExp);
<a name="l00446"></a>00446 }
<a name="l00447"></a>00447
<a name="l00448"></a>00448 GenerateConstraint(ToReadMax, FromReadMax, VarLiteral::MAX, aliasBlame, location, type);
<a name="l00449"></a>00449 GenerateConstraint(ToWriteMax, FromWriteMax, VarLiteral::MIN, aliasBlame, location, type);
<a name="l00450"></a>00450 GenerateConstraint(ToReadMin, FromReadMin, VarLiteral::MIN, aliasBlame, location, type);
<a name="l00451"></a>00451 GenerateConstraint(ToWriteMin, FromWriteMin, VarLiteral::MAX, aliasBlame, location, type);
<a name="l00452"></a>00452 }
<a name="l00453"></a>00453
<a name="l00454"></a>00454
<a name="l00455"></a>00455 <span class="keywordtype">void</span> ConstraintGenerator::GenerateShiftConstraint(<span class="keyword">const</span> BinaryOperator* I) {
<a name="l00456"></a>00456 <a class="code" href="classboa_1_1Integer.html">Integer</a> intLiteral(I);
<a name="l00457"></a>00457 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> operand1 = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(1), VarLiteral::MAX);
<a name="l00458"></a>00458 <span class="keywordflow">if</span> (!operand1.<a class="code" href="classboa_1_1Constraint_1_1Expression.html#a32fe4a7ca50adbae36ba131e95af3382">IsConst</a>()) {
<a name="l00459"></a>00459 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(intLiteral, <span class="stringliteral">"Non-const shift factor."</span>, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00460"></a>00460 <span class="keywordflow">return</span>;
<a name="l00461"></a>00461 }
<a name="l00462"></a>00462 <span class="keywordtype">double</span> shiftFactor = 1 << (int)operand1.GetConst();
<a name="l00463"></a>00463 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> maxOperand = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MAX);
<a name="l00464"></a>00464 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> minOperand = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getOperand(0), VarLiteral::MIN);
<a name="l00465"></a>00465
<a name="l00466"></a>00466 <span class="keywordflow">switch</span> (I->getOpcode()) {
<a name="l00467"></a>00467 <span class="keywordflow">case</span> Instruction::Shl:
<a name="l00468"></a>00468 minOperand.mul(shiftFactor);
<a name="l00469"></a>00469 maxOperand.mul(shiftFactor);
<a name="l00470"></a>00470 <span class="keywordflow">break</span>;
<a name="l00471"></a>00471 <span class="keywordflow">case</span> Instruction::AShr:
<a name="l00472"></a>00472 minOperand.div(shiftFactor);
<a name="l00473"></a>00473 maxOperand.div(shiftFactor);
<a name="l00474"></a>00474 <span class="keywordflow">break</span>;
<a name="l00475"></a>00475 <span class="keywordflow">default</span>:
<a name="l00476"></a>00476 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(intLiteral, <span class="stringliteral">"Logical Shr - unbound."</span>, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00477"></a>00477 <span class="keywordflow">return</span>;
<a name="l00478"></a>00478 }
<a name="l00479"></a>00479
<a name="l00480"></a>00480 <span class="keywordtype">string</span> blame = <span class="stringliteral">"Shift operation"</span>, loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00481"></a>00481
<a name="l00482"></a>00482 GenerateConstraint(intLiteral, maxOperand, VarLiteral::USED, VarLiteral::MAX, blame, loc);
<a name="l00483"></a>00483 GenerateConstraint(intLiteral, minOperand, VarLiteral::USED, VarLiteral::MAX, blame, loc);
<a name="l00484"></a>00484 GenerateConstraint(intLiteral, maxOperand, VarLiteral::USED, VarLiteral::MIN, blame, loc);
<a name="l00485"></a>00485 GenerateConstraint(intLiteral, minOperand, VarLiteral::USED, VarLiteral::MIN, blame, loc);
<a name="l00486"></a>00486 }
<a name="l00487"></a>00487
<a name="l00488"></a>00488 <span class="keywordtype">void</span> ConstraintGenerator::GenerateOrXorConstraint(<span class="keyword">const</span> Instruction* I) {
<a name="l00489"></a>00489 Integer intLiteral(I);
<a name="l00490"></a>00490 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(intLiteral, <span class="stringliteral">"(X)OR operation"</span>, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00491"></a>00491 }
<a name="l00492"></a>00492
<a name="l00493"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a9823a9de41fef76525bfb4afb2b23e72">00493</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a9823a9de41fef76525bfb4afb2b23e72">ConstraintGenerator::SaveDbgDeclare</a>(<span class="keyword">const</span> DbgDeclareInst* D) {
<a name="l00494"></a>00494 <span class="comment">// FIXME - magic numbers!</span>
<a name="l00495"></a>00495 <span class="keywordflow">if</span> ((!D) || (!(D->getAddress()))) {
<a name="l00496"></a>00496 <span class="keywordflow">return</span>;
<a name="l00497"></a>00497 }
<a name="l00498"></a>00498 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *pType = dyn_cast<const PointerType>(D->getAddress()->getType())) {
<a name="l00499"></a>00499 <span class="keywordflow">if</span> (<span class="keyword">const</span> StructType *sType = dyn_cast<const StructType>(pType->getElementType())) {
<a name="l00500"></a>00500 <span class="keywordflow">if</span> (<span class="keyword">const</span> MDNode *node = dyn_cast<const MDNode>(D->getVariable()->getOperand(5))) {
<a name="l00501"></a>00501 <a class="code" href="classboa_1_1ConstraintGenerator.html#af42932518279edff10b865d8423131bf">AddContainedBuffers</a>(sType, node);
<a name="l00502"></a>00502 <span class="keywordflow">return</span>;
<a name="l00503"></a>00503 }
<a name="l00504"></a>00504 }
<a name="l00505"></a>00505 }
<a name="l00506"></a>00506 <span class="keywordflow">if</span> (<span class="keyword">const</span> MDString *S = dyn_cast<const MDString>(D->getVariable()->getOperand(2))) {
<a name="l00507"></a>00507 <span class="keywordflow">if</span> (<span class="keyword">const</span> MDNode *node = dyn_cast<const MDNode>(D->getVariable()->getOperand(3))) {
<a name="l00508"></a>00508 <span class="keywordflow">if</span> (<span class="keyword">const</span> MDString *file = dyn_cast<const MDString>(node->getOperand(1))) {
<a name="l00509"></a>00509 LOG << (<span class="keywordtype">void</span>*)D->getAddress() << <span class="stringliteral">" name = "</span> << S->getString().str() << <span class="stringliteral">" Source location - "</span>
<a name="l00510"></a>00510 << file->getString().str() << <span class="stringliteral">":"</span> << D->getDebugLoc().getLine() << endl;
<a name="l00511"></a>00511
<a name="l00512"></a>00512 stringstream ss;
<a name="l00513"></a>00513 ss << file->getString().str() << <span class="stringliteral">":"</span> << D->getDebugLoc().getLine();
<a name="l00514"></a>00514 <a class="code" href="classboa_1_1Buffer.html">Buffer</a> b(D->getAddress(), S->getString().str(), ss.str());
<a name="l00515"></a>00515
<a name="l00516"></a>00516 <span class="keywordflow">if</span> (<a class="code" href="classboa_1_1ConstraintGenerator.html#a1980861ccb54c10e058552510ecd6e17">allocedBuffers_</a>[D->getAddress()]) {
<a name="l00517"></a>00517 <a class="code" href="classboa_1_1ConstraintGenerator.html#a29c4fcb5f1f1b5bd2dcee516b4827b6c">AddBuffer</a>(b, ss.str());
<a name="l00518"></a>00518 }
<a name="l00519"></a>00519
<a name="l00520"></a>00520 <span class="keywordflow">return</span>;
<a name="l00521"></a>00521 }
<a name="l00522"></a>00522 }
<a name="l00523"></a>00523 }
<a name="l00524"></a>00524 <span class="comment">// else</span>
<a name="l00525"></a>00525 LOG << <span class="stringliteral">"Can't extract debug info\n"</span>;
<a name="l00526"></a>00526 }
<a name="l00527"></a>00527
<a name="l00528"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a0ed165979ddc3a18e8a6c012feeddcdf">00528</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a0ed165979ddc3a18e8a6c012feeddcdf">ConstraintGenerator::GenerateAllocConstraint</a>(<span class="keyword">const</span> Value *I, <span class="keyword">const</span> ArrayType *aType,
<a name="l00529"></a>00529 <span class="keyword">const</span> <span class="keywordtype">string</span>& location) {
<a name="l00530"></a>00530 <a class="code" href="classboa_1_1Buffer.html">Buffer</a> buf(I);
<a name="l00531"></a>00531 <span class="keywordtype">double</span> allocSize = aType->getNumElements();
<a name="l00532"></a>00532 <a class="code" href="classboa_1_1Constraint.html">Constraint</a> allocMax, allocMin;
<a name="l00533"></a>00533 <a class="code" href="classboa_1_1ConstraintGenerator.html#a1980861ccb54c10e058552510ecd6e17">allocedBuffers_</a>[I] = <span class="keyword">true</span>;
<a name="l00534"></a>00534
<a name="l00535"></a>00535 <span class="keywordtype">string</span> blame = <span class="stringliteral">"Buffer allocation"</span>;
<a name="l00536"></a>00536
<a name="l00537"></a>00537 GenerateConstraint(buf, allocSize, VarLiteral::ALLOC, VarLiteral::MAX, blame, location);
<a name="l00538"></a>00538 GenerateConstraint(buf, allocSize, VarLiteral::ALLOC, VarLiteral::MIN, blame, location);
<a name="l00539"></a>00539 }
<a name="l00540"></a>00540
<a name="l00541"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#af42932518279edff10b865d8423131bf">00541</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#af42932518279edff10b865d8423131bf">ConstraintGenerator::AddContainedBuffers</a>(<span class="keyword">const</span> StructType *structType, <span class="keyword">const</span> MDNode *node) {
<a name="l00542"></a>00542 <span class="keywordflow">if</span> (this->structsVisited_.insert(structType).second) {
<a name="l00543"></a>00543 <span class="keywordflow">while</span> (node->getNumOperands() == 10) {
<a name="l00544"></a>00544 node = dyn_cast<MDNode>(node->getOperand(9));
<a name="l00545"></a>00545 <span class="keywordflow">if</span> (node == NULL) <span class="keywordflow">return</span>;
<a name="l00546"></a>00546 }
<a name="l00547"></a>00547 <span class="keywordtype">string</span> structName;
<a name="l00548"></a>00548 <span class="keyword">const</span> MDNode* memberNode;
<a name="l00549"></a>00549 <span class="keywordflow">if</span> (<span class="keyword">const</span> MDString* structNameNode = dyn_cast<const MDString>(node->getOperand(2))) {
<a name="l00550"></a>00550 structName = structNameNode->getString().str();
<a name="l00551"></a>00551 }
<a name="l00552"></a>00552 <span class="keywordflow">if</span> ((memberNode = dyn_cast<const MDNode>(node->getOperand(10)))) {
<a name="l00553"></a>00553 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> typeIt = 0; typeIt < structType->getNumElements(); typeIt++) {
<a name="l00554"></a>00554 <span class="keywordflow">if</span> (<span class="keyword">const</span> ArrayType *aType = dyn_cast<const ArrayType>(structType->getTypeAtIndex(typeIt))) {
<a name="l00555"></a>00555 <span class="keywordflow">if</span> (<span class="keyword">const</span> MDNode* arrayNode = dyn_cast<const MDNode>(memberNode->getOperand(typeIt))) {
<a name="l00556"></a>00556 <span class="keywordflow">if</span> (<span class="keyword">const</span> MDString* memberNameNode = dyn_cast<const MDString>(arrayNode->getOperand(2))) {
<a name="l00557"></a>00557 <span class="keywordtype">string</span> memberName = structName + <span class="stringliteral">"."</span> + memberNameNode->getString().str();
<a name="l00558"></a>00558 <a class="code" href="classboa_1_1Buffer.html">Buffer</a> buf(structType, memberName, <span class="stringliteral">""</span>, <span class="keyword">false</span>, typeIt);
<a name="l00559"></a>00559 <span class="keywordtype">double</span> allocSize = aType->getNumElements();
<a name="l00560"></a>00560 GenerateConstraint(buf, allocSize, VarLiteral::ALLOC, VarLiteral::MAX, <span class="stringliteral">"Struct alloc"</span>, <span class="stringliteral">""</span>);
<a name="l00561"></a>00561 GenerateConstraint(buf, allocSize, VarLiteral::ALLOC, VarLiteral::MIN, <span class="stringliteral">"Struct alloc"</span>, <span class="stringliteral">""</span>);
<a name="l00562"></a>00562 <a class="code" href="classboa_1_1ConstraintGenerator.html#a29c4fcb5f1f1b5bd2dcee516b4827b6c">AddBuffer</a>(buf, <span class="stringliteral">""</span>);
<a name="l00563"></a>00563 }
<a name="l00564"></a>00564 }
<a name="l00565"></a>00565 }
<a name="l00566"></a>00566 <span class="keywordflow">if</span> (<span class="keyword">const</span> StructType *sType = dyn_cast<const StructType>(structType->getTypeAtIndex(typeIt))) {
<a name="l00567"></a>00567 <a class="code" href="classboa_1_1ConstraintGenerator.html#af42932518279edff10b865d8423131bf">AddContainedBuffers</a>(sType, dyn_cast<const MDNode>(memberNode->getOperand(typeIt)));
<a name="l00568"></a>00568 }
<a name="l00569"></a>00569 }
<a name="l00570"></a>00570 }
<a name="l00571"></a>00571 }
<a name="l00572"></a>00572 }
<a name="l00573"></a>00573
<a name="l00574"></a>00574 <span class="keywordtype">void</span> ConstraintGenerator::GenerateAllocaConstraint(<span class="keyword">const</span> AllocaInst *I) {
<a name="l00575"></a>00575 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *pType = dyn_cast<const PointerType>(I->getType())) {
<a name="l00576"></a>00576 <span class="keywordflow">if</span> (<span class="keyword">const</span> ArrayType *aType = dyn_cast<const ArrayType>(pType->getElementType())) {
<a name="l00577"></a>00577 <a class="code" href="classboa_1_1ConstraintGenerator.html#a0ed165979ddc3a18e8a6c012feeddcdf">GenerateAllocConstraint</a>(I, aType, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00578"></a>00578 <span class="keywordflow">return</span>;
<a name="l00579"></a>00579 }
<a name="l00580"></a>00580 }
<a name="l00581"></a>00581 }
<a name="l00582"></a>00582
<a name="l00583"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a13d9ac99924220e4e7e0b9cf4e8e5205">00583</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a13d9ac99924220e4e7e0b9cf4e8e5205">ConstraintGenerator::GenerateGetElementPtrConstraint</a>(<span class="keyword">const</span> GetElementPtrInst *I) {
<a name="l00584"></a>00584 <span class="keyword">const</span> Value *pointerOp = I->getPointerOperand();
<a name="l00585"></a>00585 <span class="keyword">const</span> Value *accessIdx = I->getOperand(I->getNumOperands()-1);
<a name="l00586"></a>00586
<a name="l00587"></a>00587 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *pType = dyn_cast<const PointerType>(pointerOp->getType())) {
<a name="l00588"></a>00588 <span class="keyword">const</span> Type *elementType = pType->getElementType();
<a name="l00589"></a>00589 <span class="keywordflow">if</span> (<span class="keyword">const</span> StructType *sType = dyn_cast<const StructType>(elementType)) {
<a name="l00590"></a>00590 <span class="keywordflow">if</span> (<span class="keyword">const</span> PointerType *retType = dyn_cast<const PointerType>(I->getType())) {
<a name="l00591"></a>00591 <span class="keywordflow">if</span> (<span class="comment">/*const ArrayType *aType = */</span>dyn_cast<const ArrayType>(retType->getElementType())) {
<a name="l00592"></a>00592 <span class="keywordtype">int</span> offset = (int)dyn_cast<ConstantInt>(accessIdx)->getSExtValue();
<a name="l00593"></a>00593 <a class="code" href="classboa_1_1Buffer.html">Buffer</a> b(sType, offset);
<a name="l00594"></a>00594 <a class="code" href="classboa_1_1Pointer.html">Pointer</a> ptr(I);
<a name="l00595"></a>00595 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(b, ptr, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00596"></a>00596 <span class="keywordflow">return</span>;
<a name="l00597"></a>00597 }
<a name="l00598"></a>00598 }
<a name="l00599"></a>00599 }
<a name="l00600"></a>00600 <a class="code" href="classboa_1_1Pointer.html">Pointer</a> b(pointerOp), ptr(I);
<a name="l00601"></a>00601 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(b, ptr, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I), accessIdx);
<a name="l00602"></a>00602 <span class="keywordflow">return</span>;
<a name="l00603"></a>00603 }
<a name="l00604"></a>00604 }
<a name="l00605"></a>00605
<a name="l00606"></a>00606 <span class="keywordtype">void</span> ConstraintGenerator::GenerateCallConstraint(<span class="keyword">const</span> CallInst* I) {
<a name="l00607"></a>00607 Function* f = I->getCalledFunction();
<a name="l00608"></a>00608 <span class="keywordflow">if</span> (f == NULL) {
<a name="l00609"></a>00609 <span class="keywordflow">return</span>;
<a name="l00610"></a>00610 }
<a name="l00611"></a>00611
<a name="l00612"></a>00612 <span class="keywordtype">string</span> functionName = f->getNameStr(), location = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00613"></a>00613
<a name="l00614"></a>00614 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"malloc"</span>) {
<a name="l00615"></a>00615 GenerateMallocConstraint(I, location);
<a name="l00616"></a>00616 <span class="keywordflow">return</span>;
<a name="l00617"></a>00617 }
<a name="l00618"></a>00618
<a name="l00619"></a>00619 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"strdup"</span>) {
<a name="l00620"></a>00620 GenerateStrdupConstraint(I, location);
<a name="l00621"></a>00621 <span class="keywordflow">return</span>;
<a name="l00622"></a>00622 }
<a name="l00623"></a>00623
<a name="l00624"></a>00624 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"strlen"</span>) {
<a name="l00625"></a>00625 GenerateStrlenConstraint(I, location);
<a name="l00626"></a>00626 <span class="keywordflow">return</span>;
<a name="l00627"></a>00627 }
<a name="l00628"></a>00628
<a name="l00629"></a>00629 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"strcpy"</span>) {
<a name="l00630"></a>00630 GenerateStringCopyConstraint(I);
<a name="l00631"></a>00631 <span class="keywordflow">return</span>;
<a name="l00632"></a>00632 }
<a name="l00633"></a>00633
<a name="l00634"></a>00634 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"strncpy"</span>) {
<a name="l00635"></a>00635 GenerateStrNCopyConstraint(I, <span class="stringliteral">"strncpy call"</span>, location);
<a name="l00636"></a>00636 <span class="keywordflow">return</span>;
<a name="l00637"></a>00637 }
<a name="l00638"></a>00638
<a name="l00639"></a>00639 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"strxfrm"</span>) {
<a name="l00640"></a>00640 GenerateStrNCopyConstraint(I, <span class="stringliteral">"strxfrm call"</span>, location);
<a name="l00641"></a>00641 <span class="keywordflow">return</span>;
<a name="l00642"></a>00642 }
<a name="l00643"></a>00643
<a name="l00644"></a>00644 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"memchr"</span>) {
<a name="l00645"></a>00645 GenerateMemchrConstraint(I);
<a name="l00646"></a>00646 <span class="keywordflow">return</span>;
<a name="l00647"></a>00647 }
<a name="l00648"></a>00648
<a name="l00649"></a>00649 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"memcmp"</span>) {
<a name="l00650"></a>00650 GenerateMemcmpConstraint(I);
<a name="l00651"></a>00651 <span class="keywordflow">return</span>;
<a name="l00652"></a>00652 }
<a name="l00653"></a>00653
<a name="l00654"></a>00654 <span class="keywordflow">if</span> (<a class="code" href="namespaceboa_1_1Helpers.html#aa3a02c3295df1b441ce8cb3f518f889d">Helpers::IsPrefix</a>(<span class="stringliteral">"llvm.memmove"</span>, functionName)) {
<a name="l00655"></a>00655 GenerateMemmoveConstraint(I);
<a name="l00656"></a>00656 <span class="keywordflow">return</span>;
<a name="l00657"></a>00657 }
<a name="l00658"></a>00658
<a name="l00659"></a>00659 <span class="keywordflow">if</span> (<a class="code" href="namespaceboa_1_1Helpers.html#aa3a02c3295df1b441ce8cb3f518f889d">Helpers::IsPrefix</a>(<span class="stringliteral">"llvm.memset"</span>, functionName)) {
<a name="l00660"></a>00660 GenerateMemsetConstraint(I);
<a name="l00661"></a>00661 <span class="keywordflow">return</span>;
<a name="l00662"></a>00662 }
<a name="l00663"></a>00663
<a name="l00664"></a>00664 <span class="keywordflow">if</span> (<a class="code" href="namespaceboa_1_1Helpers.html#aa3a02c3295df1b441ce8cb3f518f889d">Helpers::IsPrefix</a>(<span class="stringliteral">"llvm.memcpy"</span>, functionName)) {
<a name="l00665"></a>00665 GenerateMemcpyConstraint(I);
<a name="l00666"></a>00666 <span class="keywordflow">return</span>;
<a name="l00667"></a>00667 }
<a name="l00668"></a>00668
<a name="l00669"></a>00669 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"pipe"</span>) {
<a name="l00670"></a>00670 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> one(1.0);
<a name="l00671"></a>00671 Pointer arr(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getArgOperand(0)));
<a name="l00672"></a>00672 GenerateConstraint(arr, one, VarLiteral::LEN_WRITE, VarLiteral::MAX, <span class="stringliteral">"pipe call"</span>,
<a name="l00673"></a>00673 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00674"></a>00674 GenerateConstraint(arr, one, VarLiteral::LEN_WRITE, VarLiteral::MIN, <span class="stringliteral">"pipe call"</span>,
<a name="l00675"></a>00675 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00676"></a>00676 <span class="keywordflow">return</span>;
<a name="l00677"></a>00677 }
<a name="l00678"></a>00678
<a name="l00679"></a>00679 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"sprintf"</span>) {
<a name="l00680"></a>00680 <span class="keywordflow">if</span> (I->getNumOperands() != 3) {
<a name="l00681"></a>00681 Pointer to(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getArgOperand(0)));
<a name="l00682"></a>00682 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(to, <span class="stringliteral">"sprintf with unknown length format string"</span>,
<a name="l00683"></a>00683 <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00684"></a>00684 } <span class="keywordflow">else</span> {
<a name="l00685"></a>00685 GenerateStringCopyConstraint(I);
<a name="l00686"></a>00686 }
<a name="l00687"></a>00687 <span class="keywordflow">return</span>;
<a name="l00688"></a>00688 }
<a name="l00689"></a>00689
<a name="l00690"></a>00690 <span class="keywordflow">if</span> ((functionName == <span class="stringliteral">"strchr"</span>) || (functionName == <span class="stringliteral">"strrchr"</span>) || (functionName == <span class="stringliteral">"strpbrk"</span>)) {
<a name="l00691"></a>00691 Pointer to = <a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getArgOperand(0)), retval = <a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I);
<a name="l00692"></a>00692 Constraint::Expression end(to.NameExpression(VarLiteral::MAX, VarLiteral::LEN_READ));
<a name="l00693"></a>00693
<a name="l00694"></a>00694 <span class="comment">// worst case - strchr/strrchr return a pointer to the end of the buffer</span>
<a name="l00695"></a>00695 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(to, retval, location, NULL, &end);
<a name="l00696"></a>00696 <span class="keywordflow">return</span>;
<a name="l00697"></a>00697 }
<a name="l00698"></a>00698
<a name="l00699"></a>00699 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"strerror"</span>) {
<a name="l00700"></a>00700 <span class="comment">// strerror return a read only buffer. Since we can't create a buffer of size 0 (this kind </span>
<a name="l00701"></a>00701 <span class="comment">// of buffer will always result in overrun) </span>
<a name="l00702"></a>00702 <span class="comment">// We model it by a temporary buffer of length 1, and the returned buffer is aliased both to</span>
<a name="l00703"></a>00703 <span class="comment">// the 0th and 1st place of the buffer. This way any write access to the buffer will result</span>
<a name="l00704"></a>00704 <span class="comment">// in buffer overrun, but read access won't.</span>
<a name="l00705"></a>00705 Buffer buf(I, <span class="stringliteral">"strerror"</span>, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I), <span class="keyword">true</span>);
<a name="l00706"></a>00706 <a class="code" href="classboa_1_1ConstraintGenerator.html#a29c4fcb5f1f1b5bd2dcee516b4827b6c">AddBuffer</a>(buf, location);
<a name="l00707"></a>00707
<a name="l00708"></a>00708 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> one(1.0);
<a name="l00709"></a>00709 GenerateConstraint(buf, one, VarLiteral::ALLOC, VarLiteral::MAX, <span class="stringliteral">"strerror call"</span>, location);
<a name="l00710"></a>00710 GenerateConstraint(buf, one, VarLiteral::ALLOC, VarLiteral::MIN, <span class="stringliteral">"strerror call"</span>, location);
<a name="l00711"></a>00711 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(buf, <a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I), location, NULL, &one);
<a name="l00712"></a>00712 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(buf, <a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I), location, NULL);
<a name="l00713"></a>00713 <span class="keywordflow">return</span>;
<a name="l00714"></a>00714 }
<a name="l00715"></a>00715
<a name="l00716"></a>00716 <span class="keywordflow">if</span> (functionName == <span class="stringliteral">"write"</span>) {
<a name="l00717"></a>00717 Pointer to(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getArgOperand(0)));
<a name="l00718"></a>00718 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> minExp = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getArgOperand(1), VarLiteral::MIN);
<a name="l00719"></a>00719 minExp.add(-1.0);
<a name="l00720"></a>00720 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> maxExp = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getArgOperand(1), VarLiteral::MAX);
<a name="l00721"></a>00721 maxExp.add(-1.0);
<a name="l00722"></a>00722
<a name="l00723"></a>00723 GenerateConstraint(to, maxExp, VarLiteral::LEN_WRITE, VarLiteral::MAX, <span class="stringliteral">"write call"</span>, location);
<a name="l00724"></a>00724 GenerateConstraint(to, minExp, VarLiteral::LEN_WRITE, VarLiteral::MIN, <span class="stringliteral">"write call"</span>, location);
<a name="l00725"></a>00725 <span class="keywordflow">return</span>;
<a name="l00726"></a>00726 }
<a name="l00727"></a>00727
<a name="l00728"></a>00728 <span class="comment">// General function call</span>
<a name="l00729"></a>00729 <span class="keywordflow">if</span> (f->isDeclaration()) {
<a name="l00730"></a>00730 <span class="comment">// Has no body, assuming overrun in each buffer, and unbound return value.</span>
<a name="l00731"></a>00731 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> params = I->getNumOperands() - 1; <span class="comment">// The last operand is the called function.</span>
<a name="l00732"></a>00732 <span class="keywordtype">string</span> blame;
<a name="l00733"></a>00733
<a name="l00734"></a>00734 <a class="code" href="classboa_1_1Constraint.html#a98e88d0d16ba5ce2819763af085357c5">Constraint::Type</a> priority = Constraint::NORMAL;
<a name="l00735"></a>00735
<a name="l00736"></a>00736 <span class="comment">// Set blame and priority according to the function's level of safety.</span>
<a name="l00737"></a>00737 <span class="comment">// A function can be either safe, not safe, or unsafe.</span>
<a name="l00738"></a>00738 <span class="keywordflow">if</span> (IsUnsafeFunction(functionName)) {
<a name="l00739"></a>00739 blame = <span class="stringliteral">"unsafe function call "</span> + functionName;
<a name="l00740"></a>00740 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (IsSafeFunction(functionName)) {
<a name="l00741"></a>00741 blame = <span class="stringliteral">"safe function call "</span> + functionName;
<a name="l00742"></a>00742 } <span class="keywordflow">else</span> {
<a name="l00743"></a>00743 blame = <span class="stringliteral">"unknown function call "</span> + functionName;
<a name="l00744"></a>00744 }
<a name="l00745"></a>00745
<a name="l00746"></a>00746 <span class="comment">// Not safe and unsafe functions.</span>
<a name="l00747"></a>00747 <span class="keywordflow">if</span> (!IsSafeFunction(functionName)) {
<a name="l00748"></a>00748 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i< params; ++i) {
<a name="l00749"></a>00749 <span class="keywordflow">if</span> (I->getOperand(i)->getType()->isPointerTy()) {
<a name="l00750"></a>00750 Pointer p(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getOperand(i)));
<a name="l00751"></a>00751 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(p, blame, location, priority);
<a name="l00752"></a>00752 }
<a name="l00753"></a>00753 }
<a name="l00754"></a>00754 }
<a name="l00755"></a>00755
<a name="l00756"></a>00756 <span class="comment">// Safe function, return by pointer.</span>
<a name="l00757"></a>00757 <span class="keywordflow">if</span> (I->getType()->isPointerTy()) {
<a name="l00758"></a>00758 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I), blame, location);
<a name="l00759"></a>00759 } <span class="keywordflow">else</span> {
<a name="l00760"></a>00760 <span class="comment">// Return by value.</span>
<a name="l00761"></a>00761 Integer intLiteral(I);
<a name="l00762"></a>00762 <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">GenerateUnboundConstraint</a>(intLiteral, blame, location);
<a name="l00763"></a>00763 }
<a name="l00764"></a>00764 } <span class="keywordflow">else</span> {
<a name="l00765"></a>00765 <span class="comment">//has body, pass arguments</span>
<a name="l00766"></a>00766 <span class="keywordtype">int</span> i = 0;
<a name="l00767"></a>00767 <span class="keywordflow">for</span> (Function::const_arg_iterator it = f->arg_begin(); it != f->arg_end(); ++it, ++i) {
<a name="l00768"></a>00768 <span class="keywordflow">if</span> (it->getType()->isPointerTy()) {
<a name="l00769"></a>00769 Pointer from(I->getOperand(i)), to(it);
<a name="l00770"></a>00770 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(from, to, <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00771"></a>00771 } <span class="keywordflow">else</span> {
<a name="l00772"></a>00772 Integer to(it);
<a name="l00773"></a>00773 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(to, I->getOperand(i), VarLiteral::LEN_WRITE,
<a name="l00774"></a>00774 <span class="stringliteral">"pass integer parameter to a function"</span>, location);
<a name="l00775"></a>00775 }
<a name="l00776"></a>00776 }
<a name="l00777"></a>00777 <span class="comment">// get return value</span>
<a name="l00778"></a>00778 <span class="keywordflow">if</span> (I->getType()->isPointerTy()) {
<a name="l00779"></a>00779 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(f), <a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I), <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I));
<a name="l00780"></a>00780 } <span class="keywordflow">else</span> {
<a name="l00781"></a>00781 Integer intLiteral(I);
<a name="l00782"></a>00782 <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">GenerateGenericConstraint</a>(intLiteral, f, VarLiteral::USED, <span class="stringliteral">"user function call"</span>, location);
<a name="l00783"></a>00783 }
<a name="l00784"></a>00784 }
<a name="l00785"></a>00785 }
<a name="l00786"></a>00786
<a name="l00787"></a>00787 <span class="keywordtype">void</span> ConstraintGenerator::GenerateStrNCopyConstraint(<span class="keyword">const</span> CallInst* I, <span class="keyword">const</span> <span class="keywordtype">string</span> &blame,
<a name="l00788"></a>00788 <span class="keyword">const</span> <span class="keywordtype">string</span> &location) {
<a name="l00789"></a>00789 Pointer to(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getArgOperand(0)));
<a name="l00790"></a>00790 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> minExp = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getArgOperand(2), VarLiteral::MIN);
<a name="l00791"></a>00791 minExp.add(-1.0);
<a name="l00792"></a>00792 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> maxExp = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(I->getArgOperand(2), VarLiteral::MAX);
<a name="l00793"></a>00793 maxExp.add(-1.0);
<a name="l00794"></a>00794
<a name="l00795"></a>00795 GenerateConstraint(to, maxExp, VarLiteral::LEN_WRITE, VarLiteral::MAX, blame, location);
<a name="l00796"></a>00796 GenerateConstraint(to, minExp, VarLiteral::LEN_WRITE, VarLiteral::MIN, blame, location);
<a name="l00797"></a>00797 }
<a name="l00798"></a>00798
<a name="l00799"></a>00799 <span class="keywordtype">bool</span> ConstraintGenerator::IsSafeFunction(<span class="keyword">const</span> <span class="keywordtype">string</span>& name) {
<a name="l00800"></a>00800 <span class="keyword">static</span> <span class="keywordtype">string</span> safeFunctions[] = { <span class="stringliteral">"execv"</span>,
<a name="l00801"></a>00801 <span class="stringliteral">"fdopen"</span>,
<a name="l00802"></a>00802 <span class="stringliteral">"fopen"</span>,
<a name="l00803"></a>00803 <span class="stringliteral">"fprintf"</span>,
<a name="l00804"></a>00804 <span class="stringliteral">"fputc"</span>,
<a name="l00805"></a>00805 <span class="stringliteral">"fputs"</span>,
<a name="l00806"></a>00806 <span class="stringliteral">"free"</span>,
<a name="l00807"></a>00807 <span class="stringliteral">"fwrite"</span>,
<a name="l00808"></a>00808 <span class="stringliteral">"getopt"</span>,
<a name="l00809"></a>00809 <span class="stringliteral">"openlog"</span>,
<a name="l00810"></a>00810 <span class="stringliteral">"putc"</span>,
<a name="l00811"></a>00811 <span class="stringliteral">"putchar"</span>,
<a name="l00812"></a>00812 <span class="stringliteral">"puts"</span>,
<a name="l00813"></a>00813 <span class="stringliteral">"printf"</span>,
<a name="l00814"></a>00814 <span class="stringliteral">"setenv"</span>,
<a name="l00815"></a>00815 <span class="stringliteral">"strcmp"</span>,
<a name="l00816"></a>00816 <span class="stringliteral">"strcoll"</span>,
<a name="l00817"></a>00817 <span class="stringliteral">"strcspn"</span>,
<a name="l00818"></a>00818 <span class="stringliteral">"strncmp"</span>,
<a name="l00819"></a>00819 <span class="stringliteral">"strspn"</span>,
<a name="l00820"></a>00820 <span class="stringliteral">"strstr"</span>,
<a name="l00821"></a>00821 <span class="stringliteral">"strtok"</span>,
<a name="l00822"></a>00822 <span class="stringliteral">"syslog"</span>,
<a name="l00823"></a>00823 <span class="stringliteral">"vfprintf"</span>,
<a name="l00824"></a>00824 <span class="stringliteral">"vprintf"</span>,
<a name="l00825"></a>00825 <span class="stringliteral">"vsyslog"</span> };
<a name="l00826"></a>00826 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < (<span class="keyword">sizeof</span>(safeFunctions) / <span class="keyword">sizeof</span>(<span class="keywordtype">string</span>)); ++i) {
<a name="l00827"></a>00827 <span class="keywordflow">if</span> (name == safeFunctions[i]) {
<a name="l00828"></a>00828 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00829"></a>00829 }
<a name="l00830"></a>00830 }
<a name="l00831"></a>00831 <span class="keywordflow">if</span> (safeFunctions_.count(name) == 1) {
<a name="l00832"></a>00832 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00833"></a>00833 }
<a name="l00834"></a>00834 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00835"></a>00835 }
<a name="l00836"></a>00836
<a name="l00837"></a>00837 <span class="keywordtype">bool</span> ConstraintGenerator::IsUnsafeFunction(<span class="keyword">const</span> <span class="keywordtype">string</span>& name) {
<a name="l00838"></a>00838 <span class="keyword">static</span> <span class="keywordtype">string</span> unsafeFunctions[] = { <span class="stringliteral">"gets"</span>,
<a name="l00839"></a>00839 <span class="stringliteral">"scanf"</span>,
<a name="l00840"></a>00840 <span class="stringliteral">"strcat"</span>,
<a name="l00841"></a>00841 <span class="stringliteral">"strncat"</span> };
<a name="l00842"></a>00842 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < (<span class="keyword">sizeof</span>(unsafeFunctions) / <span class="keyword">sizeof</span>(<span class="keywordtype">string</span>)); ++i) {
<a name="l00843"></a>00843 <span class="keywordflow">if</span> (name == unsafeFunctions[i]) {
<a name="l00844"></a>00844 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00845"></a>00845 }
<a name="l00846"></a>00846 }
<a name="l00847"></a>00847 <span class="keywordflow">if</span> (unsafeFunctions_.count(name) == 1) {
<a name="l00848"></a>00848 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00849"></a>00849 }
<a name="l00850"></a>00850 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00851"></a>00851 }
<a name="l00852"></a>00852
<a name="l00853"></a>00853 <span class="keywordtype">void</span> ConstraintGenerator::GenerateStringCopyConstraint(<span class="keyword">const</span> CallInst* I) {
<a name="l00854"></a>00854 Pointer from(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getArgOperand(1)));
<a name="l00855"></a>00855 Pointer to(<a class="code" href="classboa_1_1ConstraintGenerator.html#abf6f54e75e868df003bbdcfca79106e7">makePointer</a>(I->getArgOperand(0)));
<a name="l00856"></a>00856 <span class="keywordtype">string</span> loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00857"></a>00857
<a name="l00858"></a>00858 GenerateConstraint(to.NameExpression(VarLiteral::MAX, VarLiteral::LEN_WRITE),
<a name="l00859"></a>00859 from.NameExpression(VarLiteral::MAX, VarLiteral::LEN_READ),
<a name="l00860"></a>00860 VarLiteral::MAX, <span class="stringliteral">"strcpy call"</span>, loc);
<a name="l00861"></a>00861 GenerateConstraint(to.NameExpression(VarLiteral::MIN, VarLiteral::LEN_WRITE),
<a name="l00862"></a>00862 from.NameExpression(VarLiteral::MIN, VarLiteral::LEN_READ),
<a name="l00863"></a>00863 VarLiteral::MIN, <span class="stringliteral">"strcpy call"</span>, loc);
<a name="l00864"></a>00864 }
<a name="l00865"></a>00865
<a name="l00866"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">00866</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#ac65226cc8fb94d0d5f29f3c539585669">ConstraintGenerator::GenerateGenericConstraint</a>(<span class="keyword">const</span> <a class="code" href="classboa_1_1VarLiteral.html">VarLiteral</a> &var,
<a name="l00867"></a>00867 <span class="keyword">const</span> Value *integerExpression,
<a name="l00868"></a>00868 VarLiteral::ExpressionType type,
<a name="l00869"></a>00869 <span class="keyword">const</span> <span class="keywordtype">string</span> &blame,
<a name="l00870"></a>00870 <span class="keyword">const</span> <span class="keywordtype">string</span> &location <span class="comment">/* = "" */</span>,
<a name="l00871"></a>00871 <span class="keyword">const</span> <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> &offset <span class="comment">/* = NULL */</span>) {
<a name="l00872"></a>00872 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> maxExpr = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(integerExpression, VarLiteral::MAX);
<a name="l00873"></a>00873 maxExpr.add(offset);
<a name="l00874"></a>00874 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> minExpr = <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">GenerateIntegerExpression</a>(integerExpression, VarLiteral::MIN);
<a name="l00875"></a>00875 minExpr.add(offset);
<a name="l00876"></a>00876 GenerateConstraint(var, maxExpr, type, VarLiteral::MAX, blame, location);
<a name="l00877"></a>00877 GenerateConstraint(var, minExpr, type, VarLiteral::MIN, blame, location);
<a name="l00878"></a>00878 }
<a name="l00879"></a>00879
<a name="l00880"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">00880</a> <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Constraint::Expression</a> <a class="code" href="classboa_1_1ConstraintGenerator.html#a4d10583fd2ed79cfe26a06375958b28f">ConstraintGenerator::GenerateIntegerExpression</a>(<span class="keyword">const</span> Value *expr,
<a name="l00881"></a>00881 VarLiteral::ExpressionDir dir) {
<a name="l00882"></a>00882 <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> result;
<a name="l00883"></a>00883
<a name="l00884"></a>00884 <span class="keywordflow">if</span> (<span class="keyword">const</span> ConstantInt *literal = dyn_cast<const ConstantInt>(expr)) {
<a name="l00885"></a>00885 result.add(literal->getSExtValue());
<a name="l00886"></a>00886 <span class="keywordflow">return</span> result;
<a name="l00887"></a>00887 }
<a name="l00888"></a>00888 <span class="keywordflow">if</span> (<span class="keyword">const</span> ConstantFP *fpLiteral = dyn_cast<const ConstantFP>(expr)) {
<a name="l00889"></a>00889 APFloat apFloat(fpLiteral->getValueAPF());
<a name="l00890"></a>00890 <span class="keywordtype">bool</span> ignore;
<a name="l00891"></a>00891 apFloat.convert(APFloat::IEEEdouble, APFloat::rmTowardPositive, &ignore);
<a name="l00892"></a>00892
<a name="l00893"></a>00893 result.add(apFloat.convertToDouble());
<a name="l00894"></a>00894 <span class="keywordflow">return</span> result;
<a name="l00895"></a>00895 }
<a name="l00896"></a>00896
<a name="l00897"></a>00897 <span class="comment">// Otherwise, this is a reference to another var definition</span>
<a name="l00898"></a>00898 <a class="code" href="classboa_1_1Integer.html">Integer</a> intLiteral(expr);
<a name="l00899"></a>00899 result.add(intLiteral.NameExpression(dir));
<a name="l00900"></a>00900 <span class="keywordflow">return</span> result;
<a name="l00901"></a>00901 }
<a name="l00902"></a>00902
<a name="l00903"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">00903</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#a6b92aeb6badd4bcce713c15fb3b80ff4">ConstraintGenerator::GenerateUnboundConstraint</a>(<span class="keyword">const</span> <a class="code" href="classboa_1_1VarLiteral.html">VarLiteral</a> &var, <span class="keyword">const</span> <span class="keywordtype">string</span> &blame,
<a name="l00904"></a>00904 <span class="keyword">const</span> <span class="keywordtype">string</span>& location <span class="comment">/* = "" */</span>,
<a name="l00905"></a>00905 <a class="code" href="classboa_1_1Constraint.html#a98e88d0d16ba5ce2819763af085357c5">Constraint::Type</a> prio <span class="comment">/* = NORMAL */</span>) {
<a name="l00906"></a>00906 GenerateConstraint(var, Expression::PosInfinity, VarLiteral::LEN_WRITE,
<a name="l00907"></a>00907 VarLiteral::MAX, blame, location, prio);
<a name="l00908"></a>00908 GenerateConstraint(var, Expression::NegInfinity, VarLiteral::LEN_WRITE,
<a name="l00909"></a>00909 VarLiteral::MIN, blame, location, prio);
<a name="l00910"></a>00910 }
<a name="l00911"></a>00911
<a name="l00912"></a>00912
<a name="l00913"></a>00913 <span class="keywordtype">void</span> ConstraintGenerator::GenerateConstraint(<span class="keyword">const</span> <a class="code" href="classboa_1_1VarLiteral.html">VarLiteral</a> &var,
<a name="l00914"></a>00914 <span class="keyword">const</span> <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> &integerExpression,
<a name="l00915"></a>00915 VarLiteral::ExpressionType type,
<a name="l00916"></a>00916 VarLiteral::ExpressionDir direction,
<a name="l00917"></a>00917 <span class="keyword">const</span> <span class="keywordtype">string</span> &blame,
<a name="l00918"></a>00918 <span class="keyword">const</span> <span class="keywordtype">string</span> &location,
<a name="l00919"></a>00919 <a class="code" href="classboa_1_1Constraint.html#a98e88d0d16ba5ce2819763af085357c5">Constraint::Type</a> prio) {
<a name="l00920"></a>00920 GenerateConstraint(var.NameExpression(direction, type), integerExpression,
<a name="l00921"></a>00921 direction, blame, location, prio);
<a name="l00922"></a>00922 }
<a name="l00923"></a>00923
<a name="l00924"></a>00924 <span class="keywordtype">void</span> ConstraintGenerator::GenerateConstraint(<span class="keyword">const</span> <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> &lhs, <span class="keyword">const</span> <a class="code" href="classboa_1_1Constraint_1_1Expression.html">Expression</a> &rhs,
<a name="l00925"></a>00925 VarLiteral::ExpressionDir direction,
<a name="l00926"></a>00926 <span class="keyword">const</span> <span class="keywordtype">string</span> &blame, <span class="keyword">const</span> <span class="keywordtype">string</span> &location,
<a name="l00927"></a>00927 <a class="code" href="classboa_1_1Constraint.html#a98e88d0d16ba5ce2819763af085357c5">Constraint::Type</a> prio) {
<a name="l00928"></a>00928 Constraint constraint(lhs, rhs, direction);
<a name="l00929"></a>00929 constraint.SetBlame(blame, location, prio);
<a name="l00930"></a>00930 cp_.AddConstraint(constraint);
<a name="l00931"></a>00931 LOG << <span class="stringliteral">"Adding - "</span> << lhs.toString() << (direction == VarLiteral::MAX ? <span class="stringliteral">" >= "</span> : <span class="stringliteral">" <= "</span>) <<
<a name="l00932"></a>00932 rhs.toString() << <span class="stringliteral">" - "</span> + blame << endl;
<a name="l00933"></a>00933 }
<a name="l00934"></a>00934
<a name="l00935"></a><a class="code" href="classboa_1_1ConstraintGenerator.html#add49592f3ab3e0a564debb47ed3ab19c">00935</a> <span class="keywordtype">void</span> <a class="code" href="classboa_1_1ConstraintGenerator.html#add49592f3ab3e0a564debb47ed3ab19c">ConstraintGenerator::GenerateBooleanConstraint</a>(<span class="keyword">const</span> Instruction *I) {
<a name="l00936"></a>00936 <span class="comment">// Assuming result is of type i1, not [N x i1].</span>
<a name="l00937"></a>00937 <a class="code" href="classboa_1_1Integer.html">Integer</a> boolean(I);
<a name="l00938"></a>00938 <span class="keywordtype">string</span> loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00939"></a>00939
<a name="l00940"></a>00940 GenerateConstraint(<span class="keywordtype">boolean</span>, 1.0, VarLiteral::USED,
<a name="l00941"></a>00941 VarLiteral::MAX, <span class="stringliteral">"Boolean Operation"</span>, loc);
<a name="l00942"></a>00942 GenerateConstraint(<span class="keywordtype">boolean</span>, 0.0, VarLiteral::USED,
<a name="l00943"></a>00943 VarLiteral::MIN, <span class="stringliteral">"Boolean Operation"</span>, loc);
<a name="l00944"></a>00944 }
<a name="l00945"></a>00945
<a name="l00946"></a>00946 <span class="keywordtype">void</span> ConstraintGenerator::GeneratePhiConstraint(<span class="keyword">const</span> PHINode *I) {
<a name="l00947"></a>00947 <span class="keywordtype">string</span> blame = <span class="stringliteral">"Phi Node"</span>, loc = <a class="code" href="classboa_1_1ConstraintGenerator.html#ae0ec6172a18acf2b8f55e19fc2e47bfa">GetInstructionFilename</a>(I);
<a name="l00948"></a>00948 LOG << <span class="stringliteral">"Phi Node at "</span> << I << <span class="stringliteral">" ("</span> << blame << <span class="stringliteral">")"</span> << endl;
<a name="l00949"></a>00949 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> numVals = I->getNumIncomingValues();
<a name="l00950"></a>00950 <span class="keywordflow">if</span> (I->getType()->isPointerTy()) {
<a name="l00951"></a>00951 <a class="code" href="classboa_1_1Pointer.html">Pointer</a> phiNode(I);
<a name="l00952"></a>00952 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < numVals; i++) {
<a name="l00953"></a>00953 <a class="code" href="classboa_1_1Pointer.html">Pointer</a> from(I->getIncomingValue(i));
<a name="l00954"></a>00954 <a class="code" href="classboa_1_1ConstraintGenerator.html#a58b04db5245a0aa704c2640369bb8ccd">GenerateBufferAliasConstraint</a>(from, phiNode, loc, NULL, NULL, blame);
<a name="l00955"></a>00955 }
<a name="l00956"></a>00956 } <span class="keywordflow">else</span> {
<a name="l00957"></a>00957 Integer phiNode(I);